Napkin holder



FIG. 1 is a front perspective view embodying my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front plan view;

FIG. 4 is a side plan view;

FIG. 5 is a rear plan view; and,

FIG. 6 is a bottom plan.

The ornamental design for a napkin holder, as shown.